Performance
· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
4.11 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
0 ms
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.005
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
5.15 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
0 ms
Page Load Progression
375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 sFPage Weight BudgetAction2.8 MB transferred, 225 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction8819ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://watch.plex.tv/_next/static/chunks/0b5~.n6cv._dk.js | 3982ms | 2897ms | 16ms | 3rd |
| https://watch.plex.tv/ | 3639ms | 168ms | 96ms | 3rd |
| Unattributable | 920ms | 18ms | 0ms | 3rd |
| https://watch.plex.tv/_next/static/chunks/0.9hh_j2ga8bo.js | 104ms | 76ms | 27ms | 3rd |
| https://watch.plex.tv/_next/static/chunks/12~bx1mtphe1a.js | 62ms | 1ms | 60ms | 3rd |
| https://watch.plex.tv/_next/static/chunks/10.9~gg31g6wt.js | 60ms | 28ms | 3ms | 3rd |
| https://watch.plex.tv/_next/static/chunks/03v8rkma_-~tx.js | 52ms | 1ms | 50ms | 3rd |
DPage Weight InventoryAction225 resources · 2.8 MB · 0 KB savings availableFIX
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 225 resources | 2.8 MiB | ||||||
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
BHTTP Cachingno-cacheREVIEW
no-cache
| Directive | Value | Meaning |
|---|---|---|
| no-cache | — | Cache but always revalidate first |
A+Text CompressionAll text resources are compressedPASS
A+Image Optimization137 images, 0 KB saveablePASS
A+Font Loading2 fonts (95 KB)PASS
Web fonts
2
95 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
Optimization checklist
- Preload critical fonts (priority=high)
- Use woff2 format for all fonts
- Set font-display to swap, optional, or fallback
- Subset large fonts (≤100 KB each)
A+JS Bundles39 scripts, 0 KB unusedPASS
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://js.sentry-cdn.com/eb76eae607a34d13b8a50419d1ffaee2.min.js | 3 KB | — | ✓ | 3rd |
| https://www.gstatic.com/cv/js/sender/v1/cast_sender.js?loadCastFramework=1 | 2 KB | — | ✓ | 3rd |
| https://accounts.google.com/gsi/client | 96 KB | — | ✓ | 3rd |
| https://watch.plex.tv/_next/static/chunks/0nax_7a.ceb.t.js | 8 KB | — | ✓ | 3rd |
| https://watch.plex.tv/_next/static/chunks/0t6banju9ym1n.js | 11 KB | — | ✓ | 3rd |
| https://watch.plex.tv/_next/static/chunks/0e5~2qdnp-24t.js | 38 KB | — | ✓ | 3rd |
| https://watch.plex.tv/_next/static/chunks/0b5~.n6cv._dk.js | 69 KB | — | ✓ | 3rd |
| https://watch.plex.tv/_next/static/chunks/turbopack-0xkc.mlcbl-k3.js | 4 KB | — | ✓ | 3rd |
| https://watch.plex.tv/_next/static/chunks/04~las1adg2-2.js | 3 KB | — | ✓ | 3rd |
| https://watch.plex.tv/_next/static/chunks/0e9.97yalk.l6.js | 13 KB | — | ✓ | 3rd |
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints6 hints, 0 missing preconnectsPASS
Current Resource Hints
6 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall225 requests over 2925msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
watch.plex.tv watch.plex.tv | Other | 3982ms | 69 KB | — | CHF63/mo | Costly |
watch.plex.tv watch.plex.tv | Other | 3639ms | 115 KB | — | CHF57/mo | Costly |
Unattributable Unattributable | Other | 920ms | 0 KB | — | CHF15/mo | Costly |
watch.plex.tv watch.plex.tv | Other | 104ms | 81 KB | — | CHF2/mo | Optional |
watch.plex.tv watch.plex.tv | Other | 62ms | 124 KB | — | CHF1/mo | Optional |
watch.plex.tv watch.plex.tv | Other | 60ms | 10 KB | — | CHF1/mo | Optional |
watch.plex.tv watch.plex.tv | Other | 52ms | 113 KB | — | CHF1/mo | Optional |
These scripts may cost more than they're worth
- watch.plex.tv adds 3982ms and costs ~CHF63/month
- watch.plex.tv adds 3639ms and costs ~CHF57/month
- Unattributable adds 920ms and costs ~CHF15/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.
Learn more ▾ ▴
Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.
Source: web.dev
watch.plex.tv takes 3982ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
watch.plex.tv takes 3639ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 920ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev